• AS/NZS 2845.1:1998

    AvailableSuperseded An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard. Its availability is maintained where it is referenced in legislation/regulations or in other Standards and its use should be restricted to where so referenced. No responsibility is taken by SAI Global as to the ongoing technical validity of such a Standard, the responsibility resting with the referencing authority.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist.
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You have already added this standard to your Watchlist.
    Visit My Watchlist to view the full list.

    Water supply - Backflow prevention devices Materials, design and performance requirements

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  03-05-1998

    Publisher:  Standards Australia

    Add to Watchlist

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    1 - AS/NZS 2845.1:1998 WATER SUPPLY-BACKFLOW PREVENTION DEVICES - MATERIALS, DESIGN AND PERFORMANCE REQUIREMENTS
    4 - PREFACE
    5 - CONTENTS
    10 - SECTION 1 SCOPE AND GENERAL
    10 - 1.1 SCOPE
    10 - 1.2 APPLICATION
    11 - 1.3 REFERENCED DOCUMENTS
    11 - 1.4 DEFINITIONS
    11 - 1.4.1 Air ports
    11 - 1.4.2 Atmospheric air
    11 - 1.4.3 Back siphonage
    11 - 1.4.4 Certifying body
    11 - 1.4.5 Component
    11 - 1.4.6 Critical installation height (CIH)
    11 - 1.4.7 Critical installation level
    11 - 1.4.8 Critical level (CL)
    11 - 1.4.9 Independently acting non-return valve
    11 - 1.4.10 Pollution
    11 - 1.4.11 Ports (vents)
    12 - 1.4.12 Rated flow
    12 - 1.4.13 Stiction
    12 - 1.5 TOLERANCES
    12 - 1.6 INSTRUMENTATION
    12 - 1.7 PRESSURE RATING
    13 - SECTION 2 MATERIALS
    13 - 2.1 GENERAL
    13 - 2.2 COMPONENTS
    13 - 2.3 SPRINGS AND CIRCLIPS
    13 - 2.4 STAINLESS STEEL
    13 - 2.5 FILLER METALS
    13 - 2.6 NICKEL-COPPER-IRON
    13 - 2.7 FERROUS MATERIALS
    13 - 2.8 ALUMINIUM ALLOYS
    14 - 2.9 CORROSION-RESISTANT METALLIC MATERIALS
    14 - 2.10 PLASTICS
    14 - 2.11 CONTAMINATION OF WATER
    15 - SECTION 3 COMMON DESIGN AND PERFORMANCE REQUIREMENTS
    15 - 3.1 GENERAL
    15 - 3.2 PRESSURE AND TEMPERATURE RANGES
    15 - 3.3 DESIGN
    15 - 3.3.1 Serviceability
    15 - 3.3.2 Release of trapped air
    15 - 3.3.3 Flexible valve seats and diaphragms
    15 - 3.4 END CONNECTIONS
    15 - 3.4.1 Threaded end connectors
    15 - 3.4.2 Compression ends
    15 - 3.4.3 Union ends
    15 - 3.4.4 Flanged ends
    15 - 3.4.5 Hose connections
    15 - 3.4.6 Test tap outlets
    16 - 3.4.7 Water meter connection ends
    16 - 3.5 NON-RETURN VALVES
    16 - 3.6 STRUCTURAL TESTS
    16 - 3.6.1 General
    16 - 3.6.2 Torque
    16 - 3.6.3 Hot water
    16 - 3.6.4 Positive pressure
    16 - 3.6.5 Reverse pressure
    16 - 3.6.6 Ultraviolet
    17 - 3.6.7 Endurance
    17 - 3.6.8 Non-testable devices (low hazard)
    17 - 3.6.9 Long-term positive pressure test for plastic-bodied devices
    17 - 3.7 TEST SEQUENCE
    19 - SECTION 4 ATMOSPHERIC VACUUM BREAKERS (AVB)
    19 - 4.1 GENERAL
    19 - 4.2 APPLICATION
    19 - 4.3 COMPONENTS
    19 - 4.3.1 Ventilation valve
    19 - 4.3.2 Non-return valve
    19 - 4.4 SPECIFIC DESIGN REQUIREMENTS
    19 - 4.4.1 Air port shields
    20 - 4.4.2 Critical level mark
    20 - 4.5 PERFORMANCE TESTS
    20 - 4.5.1 Air port opening area
    20 - 4.5.2 Water rise
    20 - 4.5.3 Rated waterflow capacity and pressure loss
    20 - 4.5.4 Ventilation valve leakage
    20 - 4.5.5 Endurance
    20 - 4.5.6 Critical level
    21 - SECTION 5 HOSE CONNECTION VACUUM BREAKERS (HCVB)
    21 - 5.1 GENERAL
    21 - 5.2 APPLICATION
    21 - 5.3 COMPONENTS
    21 - 5.3.1 Ventilation valve
    21 - 5.3.2 Non-return valve
    21 - 5.4 SPECIFIC DESIGN REQUIREMENTS
    21 - 5.4.1 Air ports locations
    21 - 5.4.2 Air ports opening area
    21 - 5.4.3 Security
    22 - 5.5 PERFORMANCE TESTS
    22 - 5.5.1 Leakage from air ports
    22 - 5.5.2 Resistance to bending
    22 - 5.5.3 Ability to resist and relieve back pressure
    22 - 5.5.4 Back pressure
    22 - 5.5.5 Back siphonage
    22 - 5.5.6 Rated flow
    22 - 5.5.7 Ability to withstand continuous pressure
    22 - 5.5.8 Endurance
    23 - SECTION 6 DUAL CHECK VALVES WITH ATMOSPHERIC PORT (DCAP)
    23 - 6.1 GENERAL
    23 - 6.2 APPLICATION
    23 - 6.3 COMPONENTS
    23 - 6.3.1 Ventilation valve
    23 - 6.3.2 Non-return valves
    23 - 6.4 SPECIFIC DESIGN REQUIREMENTS
    23 - 6.4.1 Airflow passage, cross-sectional area
    23 - 6.4.2 Airport outlet
    24 - 6.5 PERFORMANCE TESTS
    24 - 6.5.1 Non-return valve closing pressure
    24 - 6.5.2 Leakage from air ports
    24 - 6.5.3 Backflow through upstream non-return valve
    24 - 6.5.4 Ventilation valve opening pressure
    24 - 6.5.5 Back siphonage
    24 - 6.5.6 Back siphonage under back pressure
    24 - 6.5.7 Rated water-flow capacity and pressure loss
    24 - 6.5.8 Flow with low supply pressure
    24 - 6.5.9 Ability to withstand continuous pressure
    24 - 6.5.10 Endurance
    25 - SECTION 7 DUAL CHECK VALVES (DUAL CV)
    25 - 7.1 GENERAL
    25 - 7.2 APPLICATION
    25 - 7.3 COMPONENTS
    25 - 7.4 PERFORMANCE TESTS
    25 - 7.4.1 Non-return valve closing pressure
    25 - 7.4.2 Rated water-flow capacity and pressure loss
    25 - 7.4.3 Endurance
    27 - SECTION 8 DUAL CHECK VALVE WITH INTERMEDIATE VENT (Du CV)
    27 - 8.1 GENERAL
    27 - 8.2 APPLICATION
    27 - 8.3 COMPONENTS
    27 - 8.3.1 Ventilation valve
    27 - 8.3.2 Non-return valves
    27 - 8.4 SPECIFIC DESIGN REQUIREMENTS
    27 - 8.4.1 Air port locations
    27 - 8.4.2 Air ports opening area
    28 - 8.5 PERFORMANCE TESTS
    28 - 8.5.1 Non-return
    28 - 8.5.2 Minimum flow capacity
    28 - 8.5.3 Intermediate vent valve leakage
    28 - 8.5.4 Back siphonage
    28 - 8.5.5 Endurance
    29 - SECTION 9 PRESSURE TYPE VACUUM BREAKERS (PVB)
    29 - 9.1 GENERAL
    29 - 9.2 APPLICATION
    29 - 9.3 COMPONENTS
    29 - 9.3.1 Ventilation valve
    29 - 9.3.2 Non-return valves
    29 - 9.3.3 Test taps
    30 - 9.4 SPECIFIC DESIGN REQUIREMENTS
    30 - 9.4.1 Air port shields
    30 - 9.4.2 Test taps
    30 - 9.4.3 Critical level mark
    30 - 9.5 PERFORMANCE TESTS
    30 - 9.5.1 Non-return valve closing pressure
    30 - 9.5.2 Ventilation valve opening pressure
    31 - 9.5.3 Air port opening area
    31 - 9.5.4 Water rise
    31 - 9.5.5 Rated flow
    31 - 9.5.6 Endurance
    31 - 9.5.7 Critical level
    32 - SECTION 10 DOUBLE CHECK VALVES (DCV)
    32 - 10.1 GENERAL
    32 - 10.2 APPLICATION
    32 - 10.3 COMPONENTS
    32 - 10.3.1 Non-return valves
    32 - 10.3.2 Test taps
    32 - 10.4 SPECIFIC DESIGN REQUIREMENTS
    32 - 10.5 PERFORMANCE TESTS
    32 - 10.5.1 Non-return valve closing pressure
    32 - 10.5.2 Rated flow
    33 - 10.5.3 Endurance
    34 - SECTION 11 DOUBLE CHECK DETECTOR ASSEMBLY (DCDA)
    34 - 11.1 GENERAL
    34 - 11.2 APPLICATION
    34 - 11.3 COMPONENTS
    34 - 11.3.1 Main double check valve
    34 - 11.3.2 Bypass line
    34 - 11.3.3 Water meter
    34 - 11.3.4 Secondary double check valve
    34 - 11.4 PERFORMANCE TEST
    36 - SECTION 12 REDUCED PRESSURE ZONE DEVICES (RPZD)
    36 - 12.1 GENERAL
    36 - 12.2 APPLICATION
    36 - 12.3 COMPONENTS
    36 - 12.3.1 Non-return valves
    36 - 12.3.2 Relief valve
    36 - 12.3.3 Test taps
    36 - 12.4 SPECIFIC DESIGN REQUIREMENTS
    36 - 12.4.1 Relief valve diaphragm or equivalent
    37 - 12.4.2 Test taps
    37 - 12.4.3 Relief valve opening
    37 - 12.5 PERFORMANCE TESTS
    37 - 12.5.1 Downstream non-return valve closing pressure
    37 - 12.5.2 Intermediate chamber pressure
    37 - 12.5.3 Supply pressure at which the intermediate chamber becomes atmospheric
    38 - 12.5.4 Intermediate chamber pressure under back pressure conditions when the supply pressure is 14 kPa or greater
    38 - 12.5.5 Intermediate chamber pressure under back pressure conditions, when the supply pressure is less than 14 kPa
    38 - 12.5.6 Pressure differential at which relief valve commences to open
    38 - 12.5.7 Supply pressure fluctuations and discharge from relief valve
    38 - 12.5.8 Rated flow
    38 - 12.5.9 Back siphonage
    39 - 12.5.10 Back pressure
    39 - 12.5.11 Endurance
    40 - SECTION 13 REDUCED PRESSURE DETECTOR ASSEMBLY (RPDA)
    40 - 13.1 GENERAL
    40 - 13.2 APPLICATION
    40 - 13.3 COMPONENTS
    40 - 13.3.1 Main reduced pressure zone device
    40 - 13.3.2 Bypass line
    40 - 13.3.3 Water meter
    40 - 13.3.4 Secondary reduced pressure zone device
    40 - 13.4 PERFORMANCE TEST
    42 - SECTION 14 VACUUM BREAKER CHECK VALVE (VBCV)
    42 - 14.1 GENERAL
    42 - 14.2 APPLICATION
    42 - 14.3 COMPONENTS
    42 - 14.3.1 Ventilation valve
    42 - 14.3.2 Non-return valve
    42 - 14.4 SPECIFIC DESIGN REQUIREMENTS
    42 - 14.4.1 General
    42 - 14.4.2 Air ports opening area
    43 - 14.4.3 Air port shields
    43 - 14.4.4 End connection
    43 - 14.5 PERFORMANCE TESTS
    43 - 14.5.1 Strength of tap head to valve body operating mechanism
    43 - 14.5.2 Strength of valve to tap body
    43 - 14.5.3 Watertightness
    43 - 14.5.4 Leakage from air ports
    43 - 14.5.5 Ability to resist and relieve back pressure
    43 - 14.5.6 Back pressure
    43 - 14.5.7 Back siphonage
    43 - 14.5.8 Rated flow
    44 - 14.5.9 Non-return valve closing pressure
    44 - 14.5.10 Ventilation valve opening pressure
    44 - 14.5.11 Air port opening area
    44 - 14.5.12 Supply pressure fluctuations
    44 - 14.5.13 Endurance
    44 - 14.5.14 Endurance (tap operation)
    44 - 14.5.15 Ability to resist stiction or adhesion between the ventilation valve sealing elements
    45 - SECTION 15 ANTI-SPILL PRESSURE VACUUM BREAKER (APVB)
    45 - 15.1 GENERAL
    45 - 15.2 APPLICATION
    45 - 15.3 COMPONENTS
    45 - 15.3.1 Ventilation valve
    45 - 15.3.2 Air port entry seal
    45 - 15.3.3 Non-return valve
    46 - 15.3.4 Test points
    46 - 15.4 SPECIFIC DESIGN REQUIREMENTS
    46 - 15.4.1 Air port shields
    46 - 15.4.2 Test points
    46 - 15.5 PERFORMANCE TESTS
    46 - 15.5.1 Non-return valve closing pressure
    46 - 15.5.2 Ventilation valve opening pressure
    46 - 15.5.3 Air port entry seal
    46 - 15.5.4 Air port opening area
    46 - 15.5.5 Water rise
    46 - 15.5.6 Rated flow
    47 - 15.5.7 Endurance
    47 - 15.5.8 Critical level
    48 - SECTION 16 BEVERAGE DISPENSER DUAL CHECK VALVE WITH ATMOSPHERIC PORT (BDDC)
    48 - 16.1 GENERAL
    48 - 16.2 APPLICATION
    48 - 16.3 COMPONENTS
    48 - 16.3.1 Ventilation valve
    48 - 16.3.2 Non-return valves
    48 - 16.3.3 Air port
    48 - 16.4 SPECIFIC DESIGN REQUIREMENTS
    48 - 16.4.1 Air port
    48 - 16.4.2 Shields
    49 - 16.4.3 Air port opening area
    49 - 16.4.4 Strainers
    49 - 16.5 PERFORMANCE TESTS
    49 - 16.5.1 Non-return closing pressure
    49 - 16.5.2 Air port leakage
    49 - 16.5.3 Backflow through upstream non-return valve
    49 - 16.5.4 Ventilation valve opening pressure
    49 - 16.5.5 Back siphonage under back pressure
    49 - 16.5.6 Rated flow
    49 - 16.5.7 Ability to withstand continuous pressure
    49 - 16.5.8 Endurance
    50 - SECTION 17 INSTALLATION INSTRUCTIONS AND MARKING
    50 - 17.1 INSTALLATION INSTRUCTIONS
    50 - 17.2 MAINTENANCE INSTRUCTIONS
    50 - 17.3 MARKING REQUIREMENTS
    50 - 17.4 ADDITIONAL MARKING
    51 - APPENDIX A - REFERENCED DOCUMENTS
    53 - APPENDIX B - INSTRUMENTATION REQUIREMENTS
    53 - B1 GENERAL
    53 - B2 FLOW METER (for use with air)
    53 - B3 FLOW METER (for use with water)
    53 - B4 PRESSURE GAUGES
    53 - B5 TEMPERATURE-INDICATING DEVICE
    53 - B6 STOPWATCH
    53 - B7 SIGHT GLASS
    54 - APPENDIX C - TORQUE TEST ON SCREWED END VALVES
    54 - C1 SCOPE
    54 - C2 TEMPERATURE OF MEASUREMENT
    54 - C3 APPARATUS
    54 - C4 PROCEDURE
    54 - C5 TEST REPORT
    55 - APPENDIX D - TEST FOR ABILITY TO WITHSTAND CONTINUOUS PRESSURE - DEVICES INTENDED FOR HOT WATER APPLICATION
    55 - D1 SCOPE
    55 - D2 TEMPERATURE OF MEASUREMENT
    55 - D3 APPARATUS
    55 - D4 PROCEDURE
    55 - D5 TEST REPORT
    56 - APPENDIX E - POSITIVE PRESSURE TEST
    56 - E1 SCOPE
    56 - E2 TEMPERATURE OF MEASUREMENT
    56 - E3 APPARATUS
    56 - E4 PROCEDURE
    56 - E5 TEST REPORT
    57 - APPENDIX F - REVERSE PRESSURE TEST
    57 - F1 SCOPE
    57 - F2 TEMPERATURE OF MEASUREMENT
    57 - F3 APPARATUS
    57 - F4 PROCEDURE
    57 - F5 TEST REPORT
    58 - APPENDIX G - AIRPORT OPENING AREA TEST - ATMOSPHERIC VACUUM BREAKERS, VACUUM BREAKER CHECK VALVES AND PRESSURE TYPE VACUUM
    58 - G1 SCOPE
    58 - G2 TEMPERATURE OF MEASUREMENT
    58 - G3 APPARATUS
    58 - G4 PROCEDURE
    58 - G5 TEST REPORT
    60 - APPENDIX H - WATER RISE TEST - ATMOSPHERIC VACUUM BREAKERS, PRESSURE TYPE VACUUM BREAKERS AND ANTI-SPILL PRESSURE VACUUM BREAKER
    60 - H1 SCOPE
    60 - H2 TEMPERATURE OF MEASUREMENTS
    60 - H3 APPARATUS
    60 - H4 PROCEDURE
    60 - H5 TEST REPORT
    62 - APPENDIX I - FOULING WIRE SIZES
    64 - APPENDIX J - ENDURANCE TEST - ATMOSPHERIC VACUUM BREAKERS
    64 - J1 SCOPE
    64 - J2 TEMPERATURE OF MEASUREMENT
    64 - J3 APPARATUS
    64 - J4 PROCEDURE
    64 - J5 TEST REPORT
    65 - APPENDIX K - TEST FOR RATED FLOW AND PRESSURE LOSS
    65 - K1 SCOPE
    65 - K2 TEMPERATURE OF MEASUREMENT
    65 - K3 APPARATUS
    65 - K4 PROCEDURE
    65 - K5 TEST REPORT
    66 - APPENDIX L - VENTILATION VALVE LEAKAGE TEST - ATMOSPHERIC VACUUM BREAKERS
    66 - L1 SCOPE
    66 - L2 TEMPERATURE OF MEASUREMENT
    66 - L3 APPARATUS
    66 - L4 PROCEDURE
    66 - L5 TEST REPORT
    67 - APPENDIX M - DETERMINATION OF CRITICAL LEVEL ATMOSPHERIC VACUUM BREAKERS, PRESSURE TYPE VACUUM BREAKERS AND ANTI-SPILL PRESSURE
    67 - M1 SCOPE
    67 - M2 TEMPERATURE OF MEASUREMENT
    67 - M3 APPARATUS
    67 - M4 PROCEDURE
    68 - M5 REPORT
    69 - APPENDIX N - TEST FOR LEAKAGE FROM AIRPORTS HOSE CONNECTION VACUUM BREAKERS AND DUAL CHECK VALVES WITH INTERMEDIATE VENTS
    69 - N1 SCOPE
    69 - N2 TEMPERATURE OF MEASUREMENT
    69 - N3 APPARATUS
    69 - N4 PROCEDURE
    69 - N5 TEST REPORT
    70 - APPENDIX O - TEST FOR RESISTANCE TO BENDING - HOSE CONNECTION VACUUM BREAKERS
    70 - O1 SCOPE
    70 - O2 TEMPERATURE OF MEASUREMENT
    70 - O3 APPARATUS
    70 - O4 PROCEDURE
    70 - O5 TEST REPORT
    71 - APPENDIX P - TEST FOR RESISTANCE AND RELIEF OF BACK PRESSURE - HOSE CONNECTION VACUUM BREAKERS
    71 - P1 SCOPE
    71 - P2 TEMPERATURE OF MEASUREMENT
    71 - P3 APPARATUS
    71 - P4 PROCEDURE
    71 - P5 TEST REPORT
    72 - APPENDIX Q - BACK PRESSURE TEST - HOSE CONNECTION VACUUM BREAKERS AND VACUUM BREAKER CHECK VALVES
    72 - Q1 SCOPE
    72 - Q2 TEMPERATURE OF MEASUREMENT
    72 - Q3 APPARATUS
    72 - Q4 PROCEDURE
    72 - Q5 TEST REPORT
    73 - APPENDIX R - TEST FOR BACK SIPHONAGE - HOSE CONNECTION VACUUM BREAKERS, AND DUAL CHECK VALVES WITH ATMOSPHERIC PORT AND VACUUM
    73 - R1 SCOPE
    73 - R2 TEMPERATURE OF MEASUREMENT
    73 - R3 APPARATUS
    73 - R4 PROCEDURE
    73 - R5 TEST REPORT
    74 - APPENDIX S - TEST FOR RATED WATER FLOW CAPACITY AND PRESSURE LOSS - HOSE CONNECTION VACUUM BREAKERS
    74 - S1 SCOPE
    74 - S2 TEMPERATURE OF MEASUREMENT
    74 - S3 APPARATUS
    74 - S4 PROCEDURE
    74 - S5 TEST REPORT
    75 - APPENDIX T - ENDURANCE TEST - HOSE CONNECTION VACUUM BREAKERS
    75 - T1 SCOPE
    75 - T2 TEMPERATURE OF MEASUREMENT
    75 - T3 APPARATUS
    75 - T4 PROCEDURE
    75 - T5 TEST REPORT
    76 - APPENDIX U - NON-RETURN VALVE CLOSING PRESSURE TEST
    76 - U1 SCOPE
    76 - U2 TEMPERATURE OF MEASUREMENT
    76 - U3 APPARATUS
    76 - U4 PROCEDURE
    77 - U5 TEST REPORT
    78 - APPENDIX V - TEST FOR LEAKAGE FROM AIRPORTS - DUAL CHECK VALVES WITH ATMOSPHERIC PORT AND BEVERAGE DISPENSER DUAL CHECK VALVES
    78 - V1 SCOPE
    78 - V2 TEMPERATURE OF MEASUREMENT
    78 - V3 APPARATUS
    78 - V4 PROCEDURE
    78 - V5 TEST REPORT
    79 - APPENDIX W - TEST FOR BACKFLOW THROUGH UPSTREAM NON-RETURN VALVE - DUAL CHECK VALVES WITH ATMOSPHERIC PORT AND BEVERAGE DISPENSE
    79 - W1 SCOPE
    79 - W2 TEMPERATURE OF MEASUREMENT
    79 - W3 APPARATUS
    79 - W4 PROCEDURE
    79 - W5 TEST REPORT
    81 - APPENDIX X - VENTILATION VALVE OPENING PRESSURE TEST - DUAL CHECK VALVES WITH ATMOSPHERIC PORT AND BEVERAGE DISPENSER DUAL CHECK
    81 - X1 SCOPE
    81 - X2 TEMPERATURE OF MEASUREMENT
    81 - X3 APPARATUS
    81 - X4 PROCEDURE
    81 - X5 TEST REPORT
    82 - APPENDIX Y - TEST FOR BACK SIPHONAGE UNDER BACK PRESSURE - DUAL CHECK VALVES WITH ATMOSPHERIC PORT
    82 - Y1 SCOPE
    82 - Y2 TEMPERATURE OF MEASUREMENT
    82 - Y3 APPARATUS
    82 - Y4 PROCEDURE
    82 - Y5 TEST REPORT
    83 - APPENDIX Z - TESTING INSTALLATION FOR TESTS IN APPENDICES E, K, M, L, S AND AA
    84 - APPENDIX AA - TEST FOR FLOW RATE AT LOW SUPPLY PRESSURE - DUAL CHECK VALVES WITH ATMOSPHERIC PORT
    84 - AA1 SCOPE
    84 - AA2 TEMPERATURE OF MEASUREMENT
    84 - AA3 APPARATUS
    84 - AA4 PROCEDURE
    84 - AA5 TEST REPORT
    85 - APPENDIX AB - ENDURANCE TEST - DUAL CHECK VALVES WITH ATMOSPHERIC PORT
    85 - AB1 SCOPE
    85 - AB2 TEMPERATURE OF MEASUREMENT
    85 - AB3 APPARATUS
    85 - AB4 PROCEDURES
    85 - AB5 TEST REPORT
    86 - APPENDIX AC - ENDURANCE TEST - DOUBLE CHECK VALVE, DUAL CHECK VALVE, DUAL CHECK VALVE WITH INTERMEDIATE VENT AND BEVERAGE
    86 - AC1 SCOPE
    86 - AC2 TEMPERATURE OF MEASUREMENT
    86 - AC3 APPARATUS
    86 - AC4 PROCEDURE
    86 - AC5 REPORT
    87 - APPENDIX AD - BACK SIPHONAGE TEST - DUAL CHECK VALVES WITH INTERMEDIATE VENT
    87 - AD1 SCOPE
    87 - AD2 TEMPERATURE OF MEASUREMENT
    87 - AD3 APPARATUS
    87 - AD4 PROCEDURE
    87 - AD5 TEST REPORT
    89 - APPENDIX AE - VENTILATION VALVE OPENING PRESSURE TEST PRESSURE TYPE VACUUM BREAKERS, VACUUM BREAKER CHECK VALVES AND ANTI-SPILL
    89 - AE1 SCOPE
    89 - AE2 TEMPERATURE OF MEASUREMENT
    89 - AE3 APPARATUS
    89 - AE4 PROCEDURE
    89 - AE4.1 Pressure type vacuum breakers and anti-spill pressure vacuum breakers
    89 - AE4.2 Vacuum breaker check valves
    90 - AE5 TEST REPORT
    91 - APPENDIX AF - ENDURANCE TEST - PRESSURE TYPE VACUUM BREAKERS
    91 - AF1 SCOPE
    91 - AF2 TEMPERATURE OF MEASUREMENT
    91 - AF3 APPARATUS
    91 - AF4 PROCEDURE
    91 - AF5 REPORT
    92 - APPENDIX AG - INTERMEDIATE CHAMBER PRESSURE TEST - REDUCED PRESSURE ZONE DEVICES
    92 - AG1 SCOPE
    92 - AG2 TEMPERATURE OF MEASUREMENT
    92 - AG3 APPARATUS
    92 - AG4 PROCEDURE
    92 - AG5 TEST REPORT
    93 - APPENDIX AH - DETERMINATION OF SUPPLY PRESSURE AT WHICH PRESSURE IN THE INTERMEDIATE CHAMBER BECOMES ATMOSPHERIC - REDUCED
    93 - AH1 SCOPE
    93 - AH2 TEMPERATURE OF MEASUREMENT
    93 - AH3 APPARATUS
    93 - AH4 PROCEDURE
    93 - AH5 TEST REPORT
    95 - APPENDIX AI - DETERMINATION OF INTERMEDIATE CHAMBER PRESSURE UNDER BACK PRESSURE CONDITIONS WHEN THE SUPPLY PRESSURE IS 14kPa OR
    95 - AI1 SCOPE
    95 - AI2 TEMPERATURE OF MEASUREMENT
    95 - AI3 APPARATUS
    95 - AI4 PROCEDURE
    95 - AI5 TEST REPORT
    97 - APPENDIX AJ - DETERMINATION OF INTERMEDIATE CHAMBER PRESSURE UNDER BACKPRESSURE CONDITIONS WHEN THE SUPPLY PRESSURE IS LESS THAN
    97 - AJ1 SCOPE
    97 - AJ2 TEMPERATURE OF MEASUREMENT
    97 - AJ3 APPARATUS
    97 - AJ4 PROCEDURE
    97 - AJ5 TEST REPORT
    99 - APPENDIX AK -DETERMINATION OF PRESSURE DIFFERENTIAL AT WHICH RELIEF VALVE COMMENCES TO OPEN - REDUCED PRESSURE ZONE DEVICES
    99 - AK1 SCOPE
    99 - AK2 TEMPERATURE OF MEASUREMENT
    99 - AK3 APPARATUS
    99 - AK4 PROCEDURE
    99 - AK5 TEST REPORT
    101 - APPENDIX AL -TEST FOR EFFECT OF SUPPLY PRESSURE FLUCTUATION ON DISCHARGE FROM RELIEF VALVE - REDUCED PRESSURE ZONE DEVICES
    101 - AL1 SCOPE
    101 - AL2 TEMPERATURE OF MEASUREMENT
    101 - AL3 APPARATUS
    101 - AL4 PROCEDURE
    101 - AL5 TEST REPORT
    102 - APPENDIX AM - BACK SIPHONAGE TEST - REDUCED PRESSURE ZONE DEVICES
    102 - AM1 SCOPE
    102 - AM2 TEMPERATURE OF MEASUREMENT
    102 - AM3 APPARATUS
    102 - AM4 PROCEDURE
    102 - AM5 TEST REPORT
    104 - APPENDIX AN - BACK PRESSURE TEST - REDUCED PRESSURE ZONE DEVICES
    104 - AN1 SCOPE
    104 - AN2 TEMPERATURE OF MEASUREMENT
    104 - AN3 APPARATUS
    104 - AN4 PROCEDURE
    105 - AN5 TEST REPORT
    106 - APPENDIX AO - ENDURANCE TEST - REDUCED PRESSURE ZONE DEVICES
    106 - AO1 SCOPE
    106 - AO2 TEMPERATURE OF MEASUREMENT
    106 - AO3 APPARATUS
    106 - AO4 PROCEDURE
    106 - AO5 TEST REPORT
    107 - APPENDIX AP - ENDURANCE TEST - VACUUM BREAKER CHECK VALVE
    107 - API SCOPE
    107 - AP2 TEMPERATURE OF MEASUREMENT
    107 - AP3 APPARATUS
    107 - AP4 PROCEDURE
    107 - AP5 REPORT
    108 - APPENDIX AQ - ADHESION TEST - RESILIENT SEAT MATERIAL
    108 - AQ1 SCOPE
    108 - AQ2 TEMPERATURE OF MEASUREMENT
    108 - AQ3 PRINCIPLE
    108 - AQ4 APPLICATION
    108 - AQ5 APPARATUS
    109 - AQ6 PROCEDURE
    109 - AQ7 TEST REPORT
    110 - APPENDIX AR - AIR PORT ENTRY SEALING TEST ANTI-SPILL PRESSURE VACUUM BREAKERS
    110 - AR1 SCOPE
    110 - AR2 TEMPERATURE OF MEASUREMENT
    110 - AR3 APPARATUS
    110 - AR4 PROCEDURE
    110 - AR5 REPORT
    112 - APPENDIX AS - BACK SIPHONAGE TEST - BEVERAGE DISPENSER DUAL CHECK VALVE WITH ATMOSPHERIC PORT (BDDC)
    112 - AS1 SCOPE
    112 - AS2 TEMPERATURE OF MEASUREMENT
    112 - AS3 PRINCIPLE
    112 - AS4 APPARATUS
    112 - AS5 PROCEDURE
    112 - AS6 REPORT
    114 - APPENDIX AT - ENDURANCE TEST - BEVERAGE DISPENSER DUAL CHECK VALVES WITH ATMOSPHERIC PORT
    114 - AT1 SCOPE
    114 - AT2 TEMPERATURE OF MEASUREMENT
    114 - AT3 APPARATUS
    114 - AT4 PROCEDURE
    114 - AT5 REPORT
    115 - APPENDIX AU - MISCELLANEOUS GUIDELINES
    115 - AU1 PURPOSE OF BACKFLOW PREVENTION DEVICES
    115 - AU2 SAFETY PERFORMANCE STANDARD
    115 - AU3 STRUCTURAL STRENGTH OF BACKFLOW PREVENTION DEVICES
    115 - AU4 FACTORS WHICH PROMOTE POTENTIAL REVERSAL OF WATER FLOW
    115 - AU5 DEVICES DESIGNED FOR PROTECTION AGAINST BACK SIPHONAGE ONLY
    115 - AU6 NON-RETURN VALVES
    116 - AU7 DEVICES DESIGNED FOR PROTECTION AGAINST BOTH BACK SIPHONAGE AND BACK PRESSURE
    116 - AU8 SELECTION AND PERMITTED USE OF BACKFLOW PREVENTION DEVICES
    116 - AU9 AUTHORIZATION
    116 - AU10 RATED FLOWS AND PRESSURE LOSSES OF BACKFLOW PREVENTION DEVICES
    116 - AU11 OPENING AND CLOSING SPRINGS ON RELIEF AND NON-RETURN VALVES
    116 - AU12 ENDURANCE TESTS

    Abstract - (Show below) - (Hide below)

    Specifies requirements for the materials, design and performance testing of backflow devices used to prevent contamination of potable water supplies.

    Scope - (Show below) - (Hide below)

    This Standard specifies requirements for the design, performance and testing of backflow prevention devices, used for the protection of potable water. Illustrations used in this Standard are diagrammatic only and have been chosen without prejudice.The Standard covers the following types of backflow prevention devices:(a) Atmospheric vacuum breakers (AVB).(b) Hose connection vacuum breakers (HCVB).(c) Dual check valves with atmospheric port (DCAP).(d) Dual check valves (Dual CV).(e) Dual check valve with intermediate vent (Du CV).(f) Pressure type vacuum breakers (PVB).(g) Double check valves (DCV).(h) Double check detector assembly (DCDA).(i) Reduced pressure zone devices (RPZD).(j) Reduced pressure detector assembly (RPDA).(k) Vacuum breaker check valves (VBCV).(l) Anti-spill pressure vacuum breaker (APVB).(m) Beverage dispenser dual check valves with atmospheric port (BDDC).NOTE: Unless otherwise specified, the nominal size of a device is determined by the inlet connection.

    History - (Show below) - (Hide below)

    First published as AS 2845-1986.Revised and redesignated AS 2845.1-1991.Second edition 1995.Jointly revised and redesignated AS/NZS 2845.1:1998. First published as AS 2845-1986. Revised and redesignated AS 2845.1-1991. Second edition 1995. Jointly revised and redesignated AS/NZS 2845.1:1998.

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS/NZS 3499:2006 Water supply - Flexible hose assemblies (Reconfirmed 2016)
    AS/NZS 3718:2005 Water supply - Tap ware (Reconfirmed 2016)
    AS 4087-1996 Metallic flanges for waterworks purposes
    AS 3855-1994 Suitability of plumbing and water distribution systems products for contact with potable water
    AS 2845.3-1993 Water supply - Backflow prevention devices Field testing and maintenance
    AS/NZS 4331.3:1995 Metallic flanges Copper alloy and composite flanges (Reconfirmed 2020)
    AS 1447-2007 Hot-rolled spring steels (Reconfirmed 2017)
    AS/NZS 4158:2003 Thermal-bonded polymeric coatings on valves and fittings for water industry purposes
    AS/NZS 3500.0:1995 National Plumbing and Drainage Code Glossary of terms
    AS 2129-2000 Flanges for pipes, valves and fittings (Reconfirmed 2016)
    AS 1472-1991 Carbon steel spring wire for mechanical springs
    AS 2345-1992 Dezincification resistance of copper alloys
    AS 2074-2003 Cast steels
    AS 1769-1975 Welded stainless steel tubes for plumbing applications (Reconfirmed 2018)
    AS 3688-2005 Water supply - Metallic fittings and end connectors
    AS 1874-1988 Aluminium and aluminium alloys - Ingots and castings
    AS/NZS 3718:1997 Water supply - Metal-bodied taps - Specified by performance
    AS 4087-2004 Metallic flanges for waterworks purposes
    AS 3565.1-2004 Meters for water supply Cold water meters
    AS 1349-1986 Bourdon tube pressure and vacuum gauges (Reconfirmed 2018)
    AS 2074-1982 Steel castings
    AS 1447-1991 Hot-rolled spring steels
    AS 1874-2000 Aluminium and aluminium alloys - Ingots and castings (Reconfirmed 2018)
    AS 1834.1-1991 Material for soldering Solder alloys (Reconfirmed 2018)
    AS 2129-1994 Flanges for pipes, valves and fittings
    AS 2345-2006 Dezincification resistance of copper alloys
    AS 1718-1992 Water supply - Copper alloy screw-down pattern taps - Specified by dimensions
    AS/NZS 3499:1997 Flexible tube connectors for water supply
    AS 1472-2003 Carbon steel spring wire for mechanical springs
    AS/NZS 4158:1996 Thermal-bonded polymeric coatings on valves and fittings for water industry purposes
    AS/NZS 1167.1:2005 Welding and brazing - Filler metals Filler metal for brazing and braze welding
    AS/NZS 3500.0:2003 Plumbing and drainage Glossary of terms
    AS 1722.1-1975 Pipe threads of Whitworth form Sealing pipe threads (metric units)
    AS 2837-1986 Wrought alloy steels - Stainless steel bars and semi-finished products
    AS 1722.2-1992 Pipe threads of Whitworth form Fastening pipe threads (Reconfirmed 2017)
    AS/NZS 4331.1:1995 Metallic flanges Steel flanges (Reconfirmed 2020)
    AS 3688-1994 Water supply - Copper and copper alloy body compression and capillary fittings and threaded-end connectors
    AS 1167.1-1993 Welding and brazing - Filler metals Filler metal for brazing and braze welding
    AS 2738.2-1984 Copper and copper alloys - Compositions and designations - Wrought products
    AS 3565.1-1998 Meters for cold potable water - Volumetric chamber and turbine meters
    AS 3558.5-1999 Methods of testing plastics and composite materials sanitary plumbing fixtures Determination of degradation by ultraviolet light (Reconfirmed 2016)

    Standards Referencing This Book - (Show below) - (Hide below)

    AS 3565.5-2004 Meters for water supply - Water meters with two integral single check valves
    AS 5200.000-2006 Technical specification for plumbing and drainage products Procedures for certification of plumbing and drainage products (Reconfirmed 2018)
    ATS 5200.004-2005 Technical Specification for plumbing and drainage products - Urinal flushing cisterns
    ATS 5200.051-2005 Technical Specification for plumbing and drainage products Bidet douche seats
    AS 3496-1999 Metal-bodied and plastic-bodied taps
    AS 2845.3-2010 Water supply - Backflow prevention devices Field testing and maintenance of testable devices
    AS/NZS 3500.1.2:1998 National plumbing and drainage Water supply - Acceptable solutions
    AS 5047-2005 Hydraulic shoring and trench lining equipment
    ATS 5200.104-2005 Technical Specification for plumbing and drainage products - Appliances (miscellaneous)
    MP 52-2005 Manual of authorization procedures for plumbing and drainage products
    AS 3565.3-1998 Meters for cold potable water - Water meters with integral dual check valves
    ATS 5200.420-2005 Technical Specification for plumbing and drainage products - Trap-priming valves
    ATS 5200.477-2006 Technical Specification for plumbing and drainage products - Rainwater/mains supply changeover devices
    ATS 5200.103-2004 Technical Specification for plumbing and drainage products - Water treatment systems (other than those specified in AS/NZS 3497)
    AS 2845.2-1996 Water supply - Backflow prevention devices Air gaps and break tanks
    ATS 5200.101-2005 Technical Specification for plumbing and drainage products - Appliances (low hazard rating)
    AS 5200.000-2005 Technical specification for plumbing and drainage products Procedures for certification of plumbing and drainage products
    AS 2845.2-2010 Water supply - Backflow preventions devices Registered air gaps and registered break tanks
    AS/NZS 3718:2005 Water supply - Tap ware (Reconfirmed 2016)
    ATS 5200.466-2004 Technical Specification for plumbing and drainage products - Rainwater tank connection devices
    AS 1172.2-1999 Water closet (WC) pans of 6/3 L capacity or proven equivalent - Cisterns
    AS/NZS 3500.5:2000 National Plumbing and Drainage - Domestic installations
    ATS 5200.105-2005 Technical Specification for plumbing and drainage products Appliances - Beverage dispensers and icemakers
    AS/NZS 4233.2:1999 High pressure water (hydro) jetting systems Construction and performance
    AS/NZS 3497:1998 Drinking water treatment units - Plumbing requirements
    AS 2845.3-1993 Water supply - Backflow prevention devices Field testing and maintenance
    MP 52-2001 Manual of authorization procedures for plumbing and drainage products
    AS 3565.3-2004 Meters for water supply - Water meters with integral dual check valves
    AS/NZS 3500.1:2003 Plumbing and drainage Water services
    AS 2419.1-2005 Fire hydrant installations System design, installation and commissioning
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective